Detailed text transcripts for TV channel - DW - 20180619:04:48:00
In the tropics. skin that's darker contains a larger amount of a natural pigment called melanin. and the protection it provides is important because u.v. rays destroy budiman in the body that is important to subdivision for example during prenatal developement. up in the high north because u.v. radiation is so much weaker than in africa people of alt tabbing pale skin with less melanin. because the body also needs u.v. rays to produce the human team that plays an important role in building bones and helps ensure the immune system works optimally. if outlet is right right up in class only they ...
Source: news source